Do dual-cure bulk-fill resin composites reduce gaps and improve depth of cure

Fraga, May Anny Alves; Correr-Sobrinho, Lourenço; Sinhoreti, Mário Alexandre Coelho; Carletti, Talita Malini; Correr, Américo Bortolazzo

doi:10.1590/0103-6440202104497

Cited by 3 publications

(10 citation statements)

References 21 publications

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“…In addition, polymerization shrinkage stress may induce gap formation, which depends on the degree of conversion and elastic modulus of the resin composites 18 . Previous studies have found a higher degree of conversion in HF groups than in other resin composites 12,13,19 . Although the degree of conversion values improve the mechanical properties, this also may increase the polymerization shrinkage and, consequently, gap formation.…”

Section: Discussionmentioning

confidence: 99%

“…Thirty‐five samples were divided into seven groups ( n = 5). The number of samples per group was based on previous studies 12,17 . The Clearfil SE Bond 2 (Kuraray Noritake Dental, Tokyo, Japan) adhesive system was applied according to the manufacturer's instructions in all preparations.…”

Section: Methodsmentioning

confidence: 99%

“…Dual‐cure bulk‐fill composites have emerged to overcome issues related to light attenuation and improve the depth of polymerization 12 . Self‐cure does not depend on light.…”

Section: Introductionmentioning

confidence: 99%

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Delayed light‐curing of dual‐cure bulk‐fill composites on internal adaptation and depth of cure

Rissato

Fraga

Gonçalves

et al. 2023

J Esthet Restor Dent

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Objective: To evaluate the effect of delayed light-curing of dual-cure bulk-fill composites on internal adaptation and microhardness (KHN) in depth.Materials and Methods: Bulk-fill composites were placed in 35 box-shaped preparations and cured according to the following protocols (n = 5): Filtek Bulk-Fill light-cured immediately after insertion (FBF); Bulk-EZ light-cured immediately after insertion (BEZ-I); Bulk-EZ light-cured 90 s after insertion (BEZ-DP); Bulk-EZ selfcured (BEZ-SC); HyperFIL light-cured immediately after insertion (HF-I); HyperFIL light-cured 90 s after insertion (HF-DP); HyperFIL self-cured (HF-SC). After 24 h, the samples were axially sectioned, and the internal adaptation was evaluated using replicas under a scanning electron microscope. The KHN was evaluated at six depths (0.3 mm, 1 mm, 2 mm, 3 mm, 4 mm, and 5 mm). The statistical analysis was performed using α = 0.05. Results:The KHN significantly decreased with depth, except in self-curing mode, when it was similar at all depths. Delayed light-curing significantly increased the KHN at higher depths. The internal adaptation was material-dependent. Light-curing did not influence the internal adaptation of HyperFIL, whereas delayed light-curing significantly reduced the internal gaps (%) of Bulk-EZ. Conclusion: Delayed light-curing improved the depth of cure of dual-cure resin composites. Light-curing did not influence the internal adaptation of HyperFIL, but delayed light-curing improved the internal adaptation of Bulk-EZ.Clinical Significance: Light-curing is fundamental for improving the mechanical properties of dual-cure resin composites. Moreover, depending on the dual-cure resin composite, the delay in light-curing can reduce the internal gaps.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Delayed light‐curing of dual‐cure bulk‐fill composites on internal adaptation and depth of cure

Rissato

Fraga

Gonçalves

et al. 2023

J Esthet Restor Dent

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“…Moreover, HyperFIL was photoactivated for 40 s, resulting in a total radiant exposure of 44 J/cm². This may have contributed to a higher DC% (31).…”

Section: Discussionmentioning

confidence: 99%

Depth of Cure, Mechanical Properties and Morphology of Dual-Cure Bulk-Fill Composites

Güngör

Durmuş

Kurt

et al. 2022

Odovtos - Int J Dent Sc

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This study evaluated selected structural and physical properties, such as degree of conversion (DC), Vickers hardness (VHN), and compression strength (CS), of three new dual-cure bulk-fill resin-based composites (RBCs; ACTIVA, HyperFIL, and Fill-Up) and compared them to those of a conventional RBC (Filtek Z250) at three clinically relevant depths. Samples (n=180) were prepared in three depths (2,4, and 6mm). Fourier-transform infrared spectroscopy (FTIR) analysis and VHN and CS tests were performed. The DC value was calculated by considering the relative change in the aliphatic C=C peaks. The fractured surfaces of representative samples were characterized using scanning electron microscopy (SEM). Data were statistically evaluated using two-way analysis of variance and post hoc Bonferroni tests (p<0.05). According to the VHN results, Filtek Z250 showed the highest bottom/top hardness ratio (97.94±1.01) at 2mm thickness and ACTIVA showed the lowest bottom/top hardness ratio (43.48±5.64) at 6mm thickness (p<0.001). According to the FTIR results, the DC decreased with increasing thickness in all materials (p<0.05). Filtek Z250 showed the highest (301±12.4 MPa) and ACTIVA exhibited the lowest (232±17.2 MPa) CS values at 2mm thickness (p<0.05). The lowest CS values were obtained for ACTIVA, and the highest values were obtained for Filtek Z250 for samples with thicknesses of 4 and 6mm, respectively (p<0.05). The structural features of restorative composites, such as the resin chemistry and filler type and content, and the operational parameters (i.e., material thickness and curing conditions) strongly affect crosslinking reactions and thus the DC, VHN, and CS values.

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“…Bonding agents with incorporated MDP and fluorides might be an advantageous option to impart antibacterial and MMPs’ inhibiting effects and enhance bond durability [ 125 , 188 ]. Partial indirect restorations with DME have good survival rates [ 103 , 189 , 190 ]. The surface roughness of DME material is critical as it might favor biofilm accumulation, particularly in deep gingival margin locations.…”

Section: Protocols To Improve Proximal Contours and Contact Qualitymentioning

confidence: 99%

Current Strategies to Control Recurrent and Residual Caries with Resin Composite Restorations: Operator- and Material-Related Factors

Elgezawi

Haridy

Abdalla

et al. 2022

JCM

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This review addresses the rationale of recurrent and/or residual caries associated with resin composite restorations alongside current strategies and evidence-based recommendations to arrest residual caries and restrain recurrent caries. The PubMed and MEDLINE databases were searched for composite-associated recurrent/residual caries focusing on predisposing factors related to materials and operator’s skills; patient-related factors were out of scope. Recurrent caries and fractures are the main reasons for the failure of resin composites. Recurrent and residual caries are evaluated differently with no exact distinguishment, especially for wall lesions. Recurrent caries correlates to patient factors, the operator’s skills of cavity preparation, and material selection and insertion. Material-related factors are significant. Strong evidence validates the minimally invasive management of deep caries, with concerns regarding residual infected dentin. Promising technologies promote resin composites with antibacterial and remineralizing potentials. Insertion techniques influence adaptation, marginal seal, and proximal contact tightness. A reliable diagnostic method for recurrent or residual caries is urgently required. Ongoing endeavors cannot eliminate recurrent caries or precisely validate residual caries. The operator’s responsibility to precisely diagnose original caries and remaining tooth structure, consider oral environmental conditions, accurately prepare cavities, and select and apply restorative materials are integral aspects. Recurrent caries around composites requires a triad of attention where the operator’s skills are cornerstones.

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Do dual-cure bulk-fill resin composites reduce gaps and improve depth of cure

Cited by 3 publications

References 21 publications

Delayed light‐curing of dual‐cure bulk‐fill composites on internal adaptation and depth of cure

Delayed light‐curing of dual‐cure bulk‐fill composites on internal adaptation and depth of cure

Depth of Cure, Mechanical Properties and Morphology of Dual-Cure Bulk-Fill Composites

Current Strategies to Control Recurrent and Residual Caries with Resin Composite Restorations: Operator- and Material-Related Factors

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